Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien dai » hien dai
dai lao » dai lan, dai thao, dai luan
hoi cua » hoi chuc
hai cua » thai cua, dai cua, lai cua
va kinh » va tinh, qua kinh
te sach » toc sach
nang xa » lang xa, nang ma, mang xa
lao va » tao va, cao va, bao va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y ((nang xa) or (nang x)) hoi. hieu vien dai lao va kinh ((hai cua) OR (hoi cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang xa) OR (nang x)) hoi. hieu vien dai lao va kinh ((hai cua) OR (hoi cua)) tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((nang xa) or (nang x)) hoi. hieu vien dai lao va kinh ((hai cua) OR (hoi cua)) tu".
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang xa) or (nang x)) hoi. hieu vien dai lao va kinh ((hai cua) OR (hoi cua)) tu*.